[mm,v10,07/42] kasan: only build init.c for software modes

Message ID	a1864343953031cddc2cca424d9b7f50ddf971d4.1605305705.git.andreyknvl@google.com (mailing list archive)
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Headers	show Return-Path: <SRS0=2mdj=ET=kvack.org=owner-linux-mm@kernel.org> DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BB061206F9 Date: Fri, 13 Nov 2020 23:15:35 +0100 In-Reply-To: <cover.1605305705.git.andreyknvl@google.com> Message-Id: <a1864343953031cddc2cca424d9b7f50ddf971d4.1605305705.git.andreyknvl@google.com> Mime-Version: 1.0 References: <cover.1605305705.git.andreyknvl@google.com> Subject: [PATCH mm v10 07/42] kasan: only build init.c for software modes From: Andrey Konovalov <andreyknvl@google.com> To: Andrew Morton <akpm@linux-foundation.org> Cc: Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, Vincenzo Frascino <vincenzo.frascino@arm.com>, Dmitry Vyukov <dvyukov@google.com>, Andrey Ryabinin <aryabinin@virtuozzo.com>, Alexander Potapenko <glider@google.com>, Marco Elver <elver@google.com>, Evgenii Stepanov <eugenis@google.com>, Branislav Rankov <Branislav.Rankov@arm.com>, Kevin Brodsky <kevin.brodsky@arm.com>, kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Konovalov <andreyknvl@google.com> Content-Type: text/plain; charset="UTF-8" Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	kasan: add hardware tag-based mode for arm64 \| expand [mm,v10,00/42] kasan: add hardware tag-based mode for arm64 [mm,v10,01/42] kasan: drop unnecessary GPL text from comment headers [mm,v10,02/42] kasan: KASAN_VMALLOC depends on KASAN_GENERIC [mm,v10,03/42] kasan: group vmalloc code [mm,v10,04/42] kasan: shadow declarations only for software modes [mm,v10,05/42] kasan: rename (un)poison_shadow to (un)poison_range [mm,v10,06/42] kasan: rename KASAN_SHADOW_* to KASAN_GRANULE_* [mm,v10,07/42] kasan: only build init.c for software modes [mm,v10,08/42] kasan: split out shadow.c from common.c [mm,v10,09/42] kasan: define KASAN_MEMORY_PER_SHADOW_PAGE [mm,v10,10/42] kasan: rename report and tags files [mm,v10,11/42] kasan: don't duplicate config dependencies [mm,v10,12/42] kasan: hide invalid free check implementation [mm,v10,13/42] kasan: decode stack frame only with KASAN_STACK_ENABLE [mm,v10,14/42] kasan, arm64: only init shadow for software modes [mm,v10,15/42] kasan, arm64: only use kasan_depth for software modes [mm,v10,16/42] kasan, arm64: move initialization message [mm,v10,17/42] kasan, arm64: rename kasan_init_tags and mark as __init [mm,v10,18/42] kasan: rename addr_has_shadow to addr_has_metadata [mm,v10,19/42] kasan: rename print_shadow_for_address to print_memory_metadata [mm,v10,20/42] kasan: rename SHADOW layout macros to META [mm,v10,21/42] kasan: separate metadata_fetch_row for each mode [mm,v10,22/42] kasan, arm64: don't allow SW_TAGS with ARM64_MTE [mm,v10,23/42] kasan: introduce CONFIG_KASAN_HW_TAGS [mm,v10,24/42] arm64: Enable armv8.5-a asm-arch option [mm,v10,25/42] arm64: mte: Add in-kernel MTE helpers [mm,v10,26/42] arm64: mte: Reset the page tag in page->flags [mm,v10,27/42] arm64: mte: Add in-kernel tag fault handler [mm,v10,28/42] arm64: kasan: Allow enabling in-kernel MTE [mm,v10,29/42] arm64: mte: Convert gcr_user into an exclude mask [mm,v10,30/42] arm64: mte: Switch GCR_EL1 in kernel entry and exit [mm,v10,31/42] kasan, mm: untag page address in free_reserved_area [mm,v10,32/42] arm64: kasan: Align allocations for HW_TAGS [mm,v10,33/42] arm64: kasan: Add arch layer for memory tagging helpers [mm,v10,34/42] kasan: define KASAN_GRANULE_SIZE for HW_TAGS [mm,v10,35/42] kasan, x86, s390: update undef CONFIG_KASAN [mm,v10,36/42] kasan, arm64: expand CONFIG_KASAN checks [mm,v10,37/42] kasan, arm64: implement HW_TAGS runtime [mm,v10,38/42] kasan, arm64: print report from tag fault handler [mm,v10,39/42] kasan, mm: reset tags when accessing metadata [mm,v10,40/42] kasan, arm64: enable CONFIG_KASAN_HW_TAGS [mm,v10,41/42] kasan: add documentation for hardware tag-based mode [mm,v10,42/42] kselftest/arm64: Check GCR_EL1 after context switch

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DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BB061206F9
Date: Fri, 13 Nov 2020 23:15:35 +0100
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Subject: [PATCH mm v10 07/42] kasan: only build init.c for software modes
From: Andrey Konovalov <andreyknvl@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
 Will Deacon <will.deacon@arm.com>,
	Vincenzo Frascino <vincenzo.frascino@arm.com>,
 Dmitry Vyukov <dvyukov@google.com>,
	Andrey Ryabinin <aryabinin@virtuozzo.com>,
 Alexander Potapenko <glider@google.com>,
	Marco Elver <elver@google.com>, Evgenii Stepanov <eugenis@google.com>,
	Branislav Rankov <Branislav.Rankov@arm.com>,
 Kevin Brodsky <kevin.brodsky@arm.com>,
	kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Andrey Konovalov <andreyknvl@google.com>
Content-Type: text/plain; charset="UTF-8"
Sender: owner-linux-mm@kvack.org
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Series

kasan: add hardware tag-based mode for arm64 | expand

Commit Message

Andrey Konovalov Nov. 13, 2020, 10:15 p.m. UTC

This is a preparatory commit for the upcoming addition of a new hardware
tag-based (MTE-based) KASAN mode.

The new mode won't be using shadow memory, so only build init.c that
contains shadow initialization code for software modes.

No functional changes for software modes.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Marco Elver <elver@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
---
Change-Id: I8d68c47345afc1dbedadde738f34a874dcae5080
---
 mm/kasan/Makefile | 6 +++---
 mm/kasan/init.c   | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/mm/kasan/Makefile b/mm/kasan/Makefile
index 370d970e5ab5..7cf685bb51bd 100644
--- a/mm/kasan/Makefile
+++ b/mm/kasan/Makefile
@@ -29,6 +29,6 @@  CFLAGS_report.o := $(CC_FLAGS_KASAN_RUNTIME)
 CFLAGS_tags.o := $(CC_FLAGS_KASAN_RUNTIME)
 CFLAGS_tags_report.o := $(CC_FLAGS_KASAN_RUNTIME)
 
-obj-$(CONFIG_KASAN) := common.o init.o report.o
-obj-$(CONFIG_KASAN_GENERIC) += generic.o generic_report.o quarantine.o
-obj-$(CONFIG_KASAN_SW_TAGS) += tags.o tags_report.o
+obj-$(CONFIG_KASAN) := common.o report.o
+obj-$(CONFIG_KASAN_GENERIC) += init.o generic.o generic_report.o quarantine.o
+obj-$(CONFIG_KASAN_SW_TAGS) += init.o tags.o tags_report.o
diff --git a/mm/kasan/init.c b/mm/kasan/init.c
index dfddd6c39fe6..1a71eaa8c5f9 100644
--- a/mm/kasan/init.c
+++ b/mm/kasan/init.c
@@ -1,6 +1,6 @@ 
 // SPDX-License-Identifier: GPL-2.0
 /*
- * This file contains some kasan initialization code.
+ * This file contains KASAN shadow initialization code.
  *
  * Copyright (c) 2015 Samsung Electronics Co., Ltd.
  * Author: Andrey Ryabinin <ryabinin.a.a@gmail.com>

[mm,v10,07/42] kasan: only build init.c for software modes

Commit Message

Patch